Stop motion for drawing frames



April 23, 1946. w SCOTT STOP MOTION FOR DRAWING FRAMES 2 Shets-$heet 1Filed April 27, 1944 V 2 Mimi-IE 'i'lllilllllialrlliiaa llilillllllllpabllppllll INVENTOR VVz/re/ $001.!

qfimzyw v ATTORN EY S A ril 23, 1946. w. J. SCOTT 2,399,148

STOP MOTION FOR DRAWING FRAMES Filed April 27, 1944 2 Sheets-Sheet 2INVENTOR Z Vb'Z/e/ ([630 01 ATTORNEYS Patented Apr. 23, i946 umrso's'rn'rs BN1 tract This invention relates to an electric stop motion fora drawing frame.- In the use of a stop motion for individual sliverswhich go to make up a single end in the drawing frame, one sliverisaptto be supported on the other in the arrangement shown in my Patent1,722,769, .while in the showing in my Patent 1,848,667 a Silver mustruncompletely through the guide for the stop motion to operate which makespiecing up difllcult.

One oi the objects of this invention is to provide an individual controlfor each of the slivers between the supply source and the draftingrolls" which will operate at once upon the silver being severed eventhough severed adjacent the supply package. 7 7

Another object of this invention is to provide a feeler arm to be heldout of engagement with the electric closing circuit contact by thesliver so that should the sliver be ruptured or break or the tensionbecomes slack the arm will move into electric circuit closing position.

Another object oi this invention is to so position the stop motion thatthe machine may be brought to rest prior to the sliver running to thedrafting rolls so that'the broken end may be more readily pieced up. 4 I

Another object of the invention is to provide a more'simple and yet morepositivepivotal mounting for the member which engages the silver androcks upon the sliver or slackened. 5 I

with these and other objects in view, the in- ;vention consists ofcertain novel features of conbeing broken Fig. 8 is a diagrammatic viewillustrating the wiring of the'electricstop motion.

In proceeding with this invention,- I mount between the sliver supplypackages and the silver. guide adjacent the drafting rolls a devicehaving a contact feeler arm for each individual sliver. The arrangementis such that each feeler arm tends to swingbygravity toward a contactbut is held therefrom by "resting upon the sliver Thus should a sliverbreak. adjacent the supply packagethe sliver quickly falls away from thefeeler arm permitting it to'dropimmediately to stop the machine andleave a long end of sliver for piecing up and continuing operation.

With reference to the drawings more specifically I have illustrated acreel in having a plurality of -sliver supply packages H. mountedthereon. The sliver ends I! extend from each of these packages "throughaguide opening or notch I3 and thence'a plurality of slivers .ar'grouped together as at It and extend through the rolls l5, l6, l7,andl8, thence through the. carrier rolls l9 and 20 to the delivery roll 2|0! the drafting device. The yarn is then conducted by the flyer '23, tobe twisted and packagedas at 24 on the package which is rotated by thespindle25,driven by the pulley 2B and belt 27 from the driving drum 28.Traverse may be had by means of the rack and gear 29 andjfl.

The device which forms'the subjectof this invention is a stop motiondesignated generally 3| and located, as shown in Fig. 1, between thesupply packages II and the guide just back of struction. as will be m rf lly described a as the drafting rolls comprising the' series ofparticularly pointed out in the appended claims.

In the accompanying drawings;

Fig. 1 is a diagrammatic view partly in section illustrating the silverfrom the supply package passing through the drafting rolls and beingtwisted and packaged on a spindle;

Fig. 2 is a view looking substantially on line 2-2 of Fig. 1: Fig. 3 isa section on substantially line 3-3 of Fig. 2;

Fig. 4 is a sectional view contact feeler arms;

through one of the Fig. 5 is a view of a fragmental portion of 'theshowing in Fig. 2 on a much larger scale;

Fig. 6 is a sectional view on substantially line 0-4 of Fig. 5;

Fig. 7 is a sectional view illustrating the mounting of one of theelectrical circuit members showing it insulated from a mounting frame;

and

[notches l3. This stop motion consists of a frame having a horizontalmounting bar32 and 81 therein.

upstanding guide bars 33 between which each silver I! passes. Anupstanding support 34 pivotally mounts a plurality of contact feelerarms 35, each arm being'provi'ded with a threaded opening 36 for thereception of a threaded bolt This threaded arrangement provides a uniqueand simple mounting for the arm'35 in a pivotal manner. The bolt itselfextends through an opening 38 in a-support 34 and is held in position bya nut .39 and washer 40. The threads of the memberj'l prevent lateralmovement ofthe arm .35 except in so far as allowed by the rockingmovement of the arm on the member 31. The rocking movement and lateralmovement caused by the threads keep a clean electrical contact at alltimes and provide a very efl'cctive electrical connection to each of thefeeler arms. The support 34 is of metal as are the feeler arms andconsequently this may be considered the ground side of an electriccircuit. A weight 4| is adjustably held by the set screw 42 on the arm35 at one side of the pivot. The arrangement which I have shown, as inFigs. 2 and e 5, is such that the arm on the side of thepivot the barupright support 34 in spaced relation to the support 34 (see Fig. 8),the opening through which it extends 44 being of a size larger than thecontact pin 43. through this opening from a bar 45 which is connected bythe wire 46 in an electrical circuit. A plurality of these contacts 43extends through support 34- from bus bar 45 as shown clearly in Fig. 3,there being one of these contacts for. each of the arms which arearranged in vertical superposed relation. A stop 41 extends outwardlyfrom the support 34 on the opposite side of the arm 35 from the contact(see Figs. 21 and 5) and would limit the upward, movement of the'arm 35by reason of this stop.

If it is desired to hold any one of the arms away from its contact 43this may be accomplished by reason of the lever 48, (see Fig. 6),pivoted as at 49 on the bar 34 in a manner so that there is sufficientfriction to maintain this lever in any adjusted position. Thus, thelever may be swung from the position shown at the lower part of Fig. 6

to the position shown at the'upper part of Fig. 6

so that its arm 50 will engage the feeler contact arm ,35 pressing itdownwardly so as to move the diately-drop to engage the contact pin 43.An

electric circuit is thus established such as shown in Fig. 8 from theelectrical supply 55 through the line 56 to the frame 34, thence throughme- 'tallic parts, including each of the feeler contact arms 35, thenceto the live contact 43, thence to bus bar 45, and wire and by line 51 toa metallic connection through the lever 58 to the electromagnet 59,thence back by line 60 to the supply 55. Thus, the electromagnet 591senergized which tips the latch 61 carried by the lever 58 to permit thespring 62 to move the lever and shift the rod 63 to move the belt fromthe tight pulley 64 to the loose pulley 65 and stop the machine.

Should it so happen that onlyfour ofthe five slivers were desired toprovide an end, then one of the arms 35 would be locked in inoperativeposition by shifting the lever 48in the position shown in Fig. 6 and theother arms would function in a normal manner.

I claim:

1. An electric stop motion for a drawing frame comprising an electriccircuit, draft rolls, a set of a plurality of sliver supply sources forsupplying a composite end to said draft rolls, guides positionedadjacent said draft rolls on the side thereof nearest said supplysources for guiding said slivers in spaced relation from each source toThe contact pin 43 extends ply sources/elongated contact feeler arms onefor each sliver pivotally mounted on said support on the side thereofnearest said supply sources and each weighted to swing in a planeextending substantially vertically to close said electric circuit butheld from such closing position by resting against a normally tensionedsliver whereby upon slackening of a sliver the arm will swing to closesaid circuit'and means responsive to the closing fof said circuit forarresting the drawing of said end.

2. An electric stop motion for a drawing frame comprising an electriccircuit, draft rolls. a set of a plurality of sliver supply sources forsupplying a composite end to said draft rolls, guides positionedadjacent said draft rolls on the side thereof nearest said supplysources for guiding said slivers in spaced relation from each'source tosaid rolls,

' contact'arm to limit movement of the arm in a said rolls, a supportseparate of said guides posi- I tioned at a location between said guidesand supa support separate of said guides positioned at a weighted toswing in a plane extending substantially parallel to said support toswing to close said electric circuit but held from such closing positionby resting against a normally tensioned sliver whereby upon slackeningof a sliver the arm will swing to close said circuit and meansresponsive to the closing of said circuit for arresting the drawing ofsaid end.

3. An. electric stop motion as set forth in claim wherein individualmeans are provided to hold each contact arm inoperative.

4. An electric stop motion as set forth in claim 1 wherein a stop'islocated adjacent each direction away from circuit closing position.

'5. An electric stop motion as set forth in claim 1 wherein a stop islocated adjacent each contact arm to limit movement of the arm in adirection away from circuit closing position and means are provided tohold each arm against its stop.

6. An electric stop motion as set forth in claim 2 wherein individualmeans are provided to hold each contact arm inoperative.

'7. An electric stop motion as set forth in claim 2 wherein a stop islocated adjacent each contact arm to limit the movement of the arm in adirection away from circuit closing position.

8. An electric stop motion as set forth in claim 2 wherein a stop islocated adjacent each contact arm to limit the movement of the arm in adirection away from circuit closing position, and means are provided tohold each arm against its stop.

9. In an electric stop motion for a drawing frame, an electric circuit,a contact feeler arm for closing said circuit, means to pivotally mountsaidarm comprising an opening in said arm and a member extending intosaid opening, said opening and member having interengaging threads.

10. In an electric stop motion for a drawing frame, an electric circuit,a contact feeler arm for closing said circuit, said arm having athreaded opening, and a threaded mounting member in said openingengaging said threads sufiiciently loosely for pivotally mounting saidarm.

WALTER J. SCOTT.

